Yes that's it. However, it is relaxing, it only takes about 20 minutes and on a hot, balmy day in Greece you cant complain about sitting back and being paddled around on a boat.
The water is absolutely freezing, I don't suggest anyone jumps in. It looks incredibly deep but it is crystal clear.
The guide will explain how it came to exist and take you around and under a massive collapsed cave, which makes you wonder when the roof will fall in ontop of you.
Nice photo opportunity and it doesn't cost a great deal, although there isn't a great deal to see.
I wouldn't go out of my way to get there, but you'd probably end up driving relatively close, and stop by if so.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.